Open Flash Chart For Rails - Missing data (null values) graph example


Note: Version 2 of Open Flash Chart is available. Examples for version 2 are here.

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The Graph:



The Code:

This code in the controller: 
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def view
  @graph = open_flash_chart_object(600,300, '/projects/open_flash_chart/null_data', true, '/projects/')     
end
def null_data
  g = Graph.new
  g.set_x_label_style(10, '#9933CC')
  g.set_y_label_steps(8)
  
  g.set_y_min(0) 
  g.set_y_max(40000)
  
  dates = (Date.civil(2007,2,19) .. Date.civil(2007,3,4)).map(&:to_s)

  g.set_x_labels(dates)

  data = []
  dates.size.times do |x|
    if x.modulo(3) == rand(3)
      data << 'null'
    else
      data << rand(40000)
    end
  end

  g.set_data(data)
  g.line_hollow(2, 4, '0x80a033', 'Bounces', 10)

  g.set_x_label_style( 10, '#CC3399', 2 );

  g.set_title("Null Data Example", '{font-size: 14px; color: #CC3399}')
  g.set_tool_tip("#val#")

  render :text => g.render
end
And this code in the view: 
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<%= @graph %>

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